The admin sqm_readers command monitors the read and delete points of the individual threads that are reading the inbound queue. If the inbound queue is not being deleted, admin sqm_readers will help you find the thread that is not reading the queue.
The admin sqm_readers command takes two parameters: the queue number and the queue type for the logical connection.
You can find the queue number and queue type in the Info column of the admin who, sqm command output: the queue number is the 3-digit number to the left of the colon, while the queue type is the digit to the right of the colon.
Queue type 1 is an inbound queue. Queue type 0 is an outbound queue. The inbound queue for a logical connection can be read by more than one thread. For example, to find out about the threads reading inbound queue number 102, execute admin sqm_readers as follows:
admin sqm_readers, 102, 1